Britain’s buy-to-let landlords have a little under a year to overhaul the way they keep their books, after HM Revenue & Customs confirmed that its long-delayed Making Tax Digital (MTD) for Income Tax regime will finally land on 6 April 2026 — and with it, the end of the once-a-year self-assessment slog for tens of thousands of property investors.
For anyone whose combined rental and self-employed turnover topped £50,000 in the 2024/25 tax year, the change is mandatory. Instead of a single annual return filed on 31 January, affected landlords will have to send HMRC four quarterly digital updates of their income and expenses, followed by an end-of-year Final Declaration. The headline filing date stays the same, but the cadence and the kit do not.
The Treasury insists the shift will modernise self-assessment and reduce the kind of errors that cost the Exchequer billions a year. Critics, including the National Residential Landlords Association, argue the burden will fall hardest on small portfolio landlords already wrestling with the Renters’ Rights Act and rising mortgage costs. Either way, the regulations are on the statute book, and the clock is ticking.
Who is caught — and when
The £50,000 threshold catches an estimated 780,000 landlords and sole traders from next April. The net widens sharply thereafter: from 6 April 2027 the bar drops to £30,000 of qualifying income, and from 6 April 2028 it falls again to £20,000, sweeping a further 900,000 individuals into the regime, according to figures published alongside HMRC’s Making Tax Digital step-by-step guidance.
“Qualifying income” is the gross figure, turnover before expenses, taken from a landlord’s most recently filed tax return. PAYE earnings, dividends and pension income are excluded, which means a higher-rate professional with a single buy-to-let yielding £20,000 a year stays outside the system, for now. A landlord with three flats producing £55,000 of rent before letting fees, mortgage interest and repairs sits squarely inside it.
The new rhythm: four updates, one declaration
Quarterly updates are not mini tax returns. They are running totals of business income and expenditure, generated automatically from MTD-compatible software and submitted to HMRC by the seventh of the month following each quarter. For the 2026/27 tax year, that means deadlines of 7 August 2026, 7 November 2026, 7 February 2027 and 7 May 2027, with a Final Declaration due by 31 January 2028.
After every quarterly filing, the software will produce a rolling estimate of the year’s tax bill, a useful early-warning system for portfolio investors used to receiving an unwelcome January surprise. Mistakes can be corrected in the next update without penalty.
The first year will operate as a soft launch: HMRC has confirmed no late-filing penalties for 2026/27 quarterly updates. From April 2027, a points-based regime kicks in, with a £200 fine triggered once a landlord accumulates four points for missed deadlines or failures to keep digital records.
The MTD landlord checklist
For property investors who would rather not spend Easter weekend staring at HMRC’s gateway, here is what to nail down between now and 6 April.
- Confirm your qualifying income. Add together gross rental receipts and any self-employed turnover from the 2024/25 return. If the total is above £50,000, MTD is mandatory from 6 April 2026. If it sits between £30,000 and £50,000, the deadline is April 2027; between £20,000 and £30,000, April 2028. Below £20,000, the existing annual self-assessment continues.
- Pick HMRC-recognised software. There are now more than 30 approved suppliers, ranging from free options such as QuickFile to subscription packages including Xero, QuickBooks, FreeAgent and Hammock. Spreadsheets are not dead, “bridging software” lets existing Excel users connect to HMRC’s API — but most landlords will find an all-in-one platform with bank feeds and receipt capture a better fit for quarterly reporting. Our guide to the best landlord tools and apps compares the leading options.
- Sign up at the right moment. Registration opens through the existing self-assessment Government Gateway login, but only landlords who have submitted at least one return in the previous two tax years can enrol. Voluntary sign-up is already live, useful for those who want a full year’s dry run.
- Block out admin time. The single biggest practical change is the move from annual reconciliation to a weekly or fortnightly routine of categorising rent receipts, mortgage interest, agent fees and repairs. Landlords used to a January scramble will need new habits.
- Decide on professional help. Accountants can file on a landlord’s behalf, but cost-effective bookkeeping software increasingly automates the heavy lifting. Many investors will end up running their own quarterly updates and using an accountant only for the Final Declaration.
Frequently asked questions
What if my income dips below £50,000 next year? HMRC determines qualifying income from the most recent return, so a landlord who falls below the threshold after enrolling will still need to follow MTD for that tax year.
I have a PAYE job and one buy-to-let. Am I caught? Only the property income counts. PAYE is already reported by the employer, so MTD bites only if gross rents exceed £50,000 (2026), £30,000 (2027) or £20,000 (2028).
How much will the software cost? Free at the basic end, £10–£20 a month for feature-rich packages with bank feeds and live profit-and-loss dashboards.
What about jointly held properties? Each owner reports their share of the income through their own MTD account, based on the beneficial split of the property.
For an industry already digesting Section 21 abolition, stamp duty surcharges and stubbornly high finance costs, MTD adds one more layer of compliance to manage. But the landlords most likely to weather the next phase of regulatory change, the ones hoovering up stock from departing amateur investors — are precisely those who already run their portfolios on a professional, digital footing. From next April, that approach stops being optional.
For HMRC’s full step-by-step guidance, including the official list of compatible software, see the GOV.UK Making Tax Digital for Income Tax collection. Landlord-specific guidance is also available from the National Residential Landlords Association’s MTD resource hub.
